Timebender is from Psionic Power. In our group we allow all PHBs and the 'Power Books'.
What does it do?
Avernian Knight is from MP 2 as well, nets you an ecounter teleport of 5 squares and at level 16 enemies ignoring your mark take 5+Con-modifier fire damage.
A super-mark then.
Well, he has two entire turns where he isn`t dazed and most attacks vs Wil either daze or impose minor penalties to attack rolls or dfenses. But yes, targeting his mind is a good idea.
I'm not sure why he's resistant to daze, but I think you could adapt several PC powers to bypass that. For instance, the wizard spell Icy Rays (PH1, encounter 3; targets two enemies and immobilizes 1 turn on a hit). I don't think he's going to be too hot (*pun*) if he's frozen in place. I changed it for an NPC in my campaign to do psychic damage and be against Will. Of course, you're running a paragon campaign, so there's no reason to limit such anti-Will attacks to something resembling a 3rd-level power. Toss in a short slide as well. Even a slide of 1 would be pretty devastating. (IME, NPC soldiers don't work well IMC because PCs push them out of the way and then gank their charge. It works the other way too.)
You could also use Come and Get It to move the PCs around rather than let them move the NPCs around. (Now you have a "shifting" duel.) If you've grabbed someone and are then slid...
Battering Shield and Sweeping Flail, IIRC. And these attack roll penalties come from his mark (-2) and Reaping Strike (-2), so he can at-will lower attack rolls by -4 (assuming he hits).
Where is Reaping Strike from? There's a power like that in the PH1 and Essentials 1, but it doesn't inflict attack penalties.
Return the favor too. I use "Glowering Threat" a lot on NPC fighters. It's a close burst 2. "Until the end of your next turn, each target takes a -5 penalty to attack rolls against any creature other than you."
Instead of targeting the solo, the PCs can find themselves targeting a distracting enemy.
With nasty elites and solos, the brwaler grabs them and the Swoard ands Board Fighter marks and then shifts away...Has not been to effective, since they are currently fighting a bunch of Yuan-Ti, so most enemies have reach.
You might want to consider soldiers who guard the solo mark the brawler. (At paragon level, solo is a misnomer.) Grabbing is an attack roll, so mark penalties still apply, and even if the brawler grabs the solo, they'll have a harder time hitting them. Furthermore, one of the big things about the fighter is you mark a target
and then you get a free hit. By shifting away, the sword and board fighter is half wasting their mark.
What information do you need?
Their levels, ACs, defenses, and attack bonuses.